Death to CAPTCHA! Google wants to make them invisible using AI

Enhance your handset with five free professional add-ons

This article was taken from the July 2014 issue of Wired magazine. Be the first to read Wired's articles in print before they're posted online, and get your hands on loads of additional content by <span class="s1">subscribing online.

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Today's smartphones are powerful pocket computers packed with sensors. Yet they could be more useful still, which is why a number of companies are developing add-ons to plug in, clip on or wirelessly connect to further augment your smartphone's capabilities. Our favourites promise to put professional tools in the hands of the smartphone-toting masses. Here are five of the best.

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ByAdam Born

With AliveCor's monitor you can press the metal plate to your chest or fingertips to get an instant ECG readout. Analyse the data with the accompanying AliveECG app or upload it to your doctor to detect irregular heart rhythms. £169

Smartphone cameras have improved, but they can't take DSLR-quality images. The QX100 aims to bridge the gap by packing a Carl Zeiss lens into a small cylinder fitting on to the back of a smartphone, and takes pictures that get close to professional calibre.£399

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The FLIR ONE transforms your smartphone into a thermal-imaging camera, providing Predator-style stealth vision. The device could be a boon for contractors and DIYers seeking heat-loss spots or water damage. Not quite X-ray vision, but close. $350

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This offers laser-accurate measurements and instant 3D models of structures from up to 180 metres away. Manufacturer ikeGPS claims the device - which combines a rangefinder, GPS and 3D compass - is useful for surveyors of all kinds. £370